public class LibraryBook {
    //bookTitle（书名），author（作者），isbn（ISBN），isAvailable（是否可借）。
    private String bookTitle;
    private String author;
    private String isbn;
    private String isAvailable;

    public void diasplayInfo() {
        System.out.println("书名：" + bookTitle);
        System.out.println("作者：" + author);
        System.out.println("ISBN：" + isbn);
        System.out.println("是否可借：" + isAvailable);
    }

    public LibraryBook(String bookTitle, String author, String isbn) {
    }

    public LibraryBook(String bookTitle, String author, String isbn, String isAvailable) {
        this.bookTitle = bookTitle;
        this.author = author;
        this.isbn = isbn;
        this.isAvailable = isAvailable;
    }
}

